From 1c13d076afb1fa02e3bc850d9f9de5128865d875 Mon Sep 17 00:00:00 2001
From: Travis Watkins <amaranth@ubuntu.com>
Date: Sat, 31 May 2014 18:28:25 -0500
Subject: [PATCH] Improve ItemStack filtering.

---
 src/main/java/net/minecraft/server/ItemStack.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
index 73428488c7..f9aaf4ab99 100644
--- a/src/main/java/net/minecraft/server/ItemStack.java
+++ b/src/main/java/net/minecraft/server/ItemStack.java
@@ -204,10 +204,14 @@ public final class ItemStack {
     public void c(NBTTagCompound nbttagcompound) {
         this.item = Item.d(nbttagcompound.getShort("id"));
         this.count = nbttagcompound.getByte("Count");
+        /* CraftBukkit start - Route through setData for filtering
         this.damage = nbttagcompound.getShort("Damage");
         if (this.damage < 0) {
             this.damage = 0;
         }
+        */
+        this.setData(nbttagcompound.getShort("Damage"));
+        // CraftBukkit end
 
         if (nbttagcompound.hasKeyOfType("tag", 10)) {
             // CraftBukkit - make defensive copy as this data may be coming from the save thread
@@ -258,6 +262,11 @@ public final class ItemStack {
                 i = 0;
             }
         }
+
+        // Filter invalid plant data
+        if (CraftMagicNumbers.getBlock(CraftMagicNumbers.getId(this.getItem())) == Blocks.DOUBLE_PLANT && (i > 5 || i < 0)) {
+            i = 0;
+        }
         // CraftBukkit end
 
         this.damage = i;
@@ -565,6 +574,7 @@ public final class ItemStack {
 
     public void setItem(Item item) {
         this.item = item;
+        this.setData(this.getData()); // CraftBukkit - Set data again to ensure it is filtered properly
     }
 
     public IChatBaseComponent E() {